Use the probability distribution table to answer the question. what is p(x≥2)? enter your answer, as a decimal, in the box
x p
0 0.03
1 0.09
2 0.21
3 0.35
4 0.21
5 0.06
6 0.05

Anyone know? will mark brainliest if correct

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4